Micrometer caliper



March 10, 1931. F. o. JAQUES, JR 1,795,778

' MICROMETER CALIPER Filed June 15, 1928 I ATTORNEY.

Patented Mar. 19, 1931 TEN FERNANDO OSCAR- JAQUES, .13., on rRovIDE cE, nnonn- ISLAND ivr'ronoivrn'rnn ALIPER Application filed June 15,

My invention has reference to an improvement in instruments of precision and more particularly to an improvement in that form of micrometer calipers known as easy reada ing micrometers.

Inthe usual form of easy reading microm eter. calipers the construction is such, that there are too many parts to move in turning the spindle, therebycreating undue friction 1 and wear in operating the micrometer.

, The object of my invention is to producean easy reading micrometer with the least number of movable parts, thereby simplifying and improving its construction and operation.

Another object of my invention is to produce an easy reading micrometer caliper having the usual U shaped handle, solong used and well liked by the users of these instruments, the U shaped handle inclosing the easy reading mechanism of the micrometer.

My invention consists in the peculiar and novel construction of an easy reading micrometer caliper, said easy reading micrometer caliper having details of construction as will be more fully set forth hereinafter and 1 claimed.

Figure 1 is a side view of my improved easy reading micrometer caliper.

Figure '2 is an enlarged detail side'handle view partly in section of the micrometer caliper.

Figure 3 is sectional view an enlarged detail transverse through the caliper taken on line 3, 3, of Figure 1 and showing the means for revolving the continuous indicating band. 7 Figure 4c is anenlarged detail sectional View similar to Figure 3, taken on line 4, 4:, of Figure 1, through the sight opening, and Figure 5 is an enlarged face view of part of the continuous indicating band on which the numerals run continuously from 0 to 99.

In the drawing, 6 indicates the U shaped handle, 7, the barrel, 8, the thimble, 9, the spindle and 10, my improved easy reading measuring indicating mechanism of the instrument. i

The handle 6, has a cavity 11, curved to conform with the handle 6. The cavity 11 is closed by a curved plate 12, secured tothe handle 6, by screws 13, 13, the pla ing a fitting 141, through which the spindle 9 extends and which has a cavity 15, forming a oppositely dispose lines 32, 82,'on the edg :the band 28, and r0 bringing the numerals posed numeral the numeral'on the band 28,

1928. Seri a1No.285,536. p

te 12, havcontinuation of the cavity '11, and a sight opening 16, as shown in Figures 1, 2 and 4. The spindle 9, has a longitudinal groovel'l', and the barrel 7, has a longitudinal indicating line 18, and a series of right angle indicating lines 19, 19, numbered from 0 to 9,

each indicating one-hundred one thousandths. of an inch. The indicating'lines 20,20, on the thimble 8, each indicate one thousandth of'an inch, as usual, A pin pulley 21, in the cavity 15,has a continuous series ofpro- Jecting pins 22, 22, and is operatively' see5 cured to the spindle 9, by a spline 23, in the spindle groove 17, as shown in Figure 4. An end roll 24:, on a transverse shaft 25, is rotatably secured in the cavity 11, and an intermediate roll 26, on a transverse shaft 27, is 7 also 'rotatably secured in. the cavity 11, as shown in Figure 2. A continuous thin metal band 28, eXtendsaround the pin pulley 21, the end-roll 24,'and flattens out on the intermediate roll 26. This continuousband 28, has 5 a continuous series of ofi side pin holes 29, through which; the pins 22, 22, on the .pin pulley 21, projects, a series of numerals 30, 30, reading from 0 to 99 on'its face and a series'of indicating lines 31, 81, on itsface,;s o one for each numeral 30, and coinciding with d longitudinal? indicating es of the sight opening n Figures 1', 2 and5. v The operation ofmy improved easy read-w; ing micrometer caliper is as follows; The thimble 8, and spindle 9, may be turned in either direction. On revolving. the spindle 9, to the left or right the pin pulley 21, is revolved with the spindle 9. This revolves lls 24 and 26, thereby 30, 30, on the band 28,.under the sight opening 16; When the thimble 8, and spindle 9, have been revolved into the position, reading is three. hundred; an. twenty-five (825) one thousandth ofan inch,.and so on, the readings being taken from the last exonthe barrel 7, and then from through the sight H 16, asshown 1 as shown in Figurel, the es opening 16. When the indicating lines 31,31, on the band 28, conicide with the indicating lines 32,32, on the sides of the sight opening 16, they also coincide with the 1ongitudinal indicating line 18, on the barrel 7, and indicate that the reading is exactly on a thousandthof an inch.

By the peculiar and novel construction of my improved easy reading micrometer caliper, the easy reading mechanism is operatively secured in the handle without changing the desired U-shape of the handle.

Having thus described my invention I claim as new 1. A micrometer caliper comprising a U- shaped handle having a bore therethrough,

aspindle extending through said bore, said handle being further formed with a. cavity therein curvedto conform to the shape thereof and av sight opening connnunicating with said-bore, the cavity being in communication with the bore,..a1 pin pulley operatively connected to the spindle, anend roll in the cavity, an intermediate roll in the cavity, a. thin continuous metal band extending around the pin, pulley and. the end roll and guided by the intermediate roll, said band having inclieating lines and numerals in a position to showinsuccession through the sight opening.

2.1 A micrometercaliper comprising a U- shaped handle having a bore therethrough, a spindle extending through said bore, said handle-being further formed with a cavity -therei'n curved'to conform to the shape thereof and a sight opening communicating with saidbore, the cavity being in communication with thebore, means carried by said spindle for driving an endless band, an end roll in the cavity, an'intermediate roll in the cavity and an endless band extending around said a spindle extending end roll and guided by 'said intermediate roll, saidband being driven by' the driving meanscarried by said spindle andhavingi'ndicating numerals thereon which show h the-sight opening:

micrometer caliper comprising a U- shaped handle having a bore therethrough, through said bore, said handle-being further provided with a cavity therein shaped to conform to the shape ofthe handle and communicating with said bore, means-positioned in said cavity forsupporting and guiding an endless band in such a manner that one transverse section of said band is located at an angle to another transverse section thereof, one of said means being carriedby said spindle, and means for driving said endless band from said spindle throu 3;

carried means, said'endless band being provided with indicia for indicating the extent of movement of said spindle relative to said handle.

4 A micrometer' caliper comprising a U- shaped handle'having a sight opening with indicating lines on its edge, a spindle extending through the handle, and walls forming a curved cavity within the handle, an end roll in the cavity, an intermediate roll in the cavity, a thin metal band extending around the end roll and guided by the intermediate roll, said band having indicating numerals which show through the sight opening and indicating lines thereon adapted to cooperate with the indicatinglines at the sight opening, and means for operatively connecting the band with. the spindle.

5. A micrometer caliper comprising a U- shaped; handle having a bore therethrough and provided with a cavity curved to conform substantially to theshape of said handle and communicating with; said. bore, a spindle movably mounted: in said bore, an. endless indicating; band operativelyconnected with said spindle and extending therearound, and 

